Concentrating apparatus.



No. 885692. IiATENTBD APR, 21, J. P. E-VANS'& R. P. AKINS.

OONGBNTRATING APPARATUS.

APPLICATION FILED um 21, 1907.

4 SHEETS-SHEBT l.

E0, 885,692. PATENTED APR. 21, 1908.

.J. P. EVANS & R. P. AKINS.

GQNGENTRATING APPARATUS.

APPLICATION PLE AH. 21. 1907.

* D J I 4 snnms snnprr 2.

12%; 385,692, PATENTED; A1 1. 21

EVANS & R. P. AKINS. 'GONOENTRATING APPARATUS.

APPLICATION FILED JAN. 21, 1907.

wi bweooao PATBNTED APR. 21. 1908. J. B: EVANS &'R.- P. AKINSQ GONOENTRATING APPARATUS.

APPLICATION FILED JAN. 21.1907.

Q SHEETS-SHEET 4.

" I I? I 7.5. /5. 40 A? Q B UNITED STATES JAMES P. EVANS ANDRANDALL P. AKINS, OFVDENVER, JQLORADO, ASSIGNORS OF ONHFIFLJJ.

TO ISABEL N ESMITH EVANS, F DENVER, COLORADO.

OONCENTRATING APPARATUS,

s ecification of Letters Patent.

patented April 21, race.

Applicationflled January 21, 1907. Sate! No 3E3,245.

Toall whom it may concern; I

Be it known that we, JAMES P. EVANS and RANDALL P. "AKINS, both citizens of the United States, residing at the city and county of Denver and State of Colorado, have invented-certain new and useful Im-= provements in Concentrating Apparatus;

' and we do declare thefollowin to be a full,

7 same, reference bein centrates. p p

OUI'IIIIPTOVBd construction includesas aclear; .and' exact descri tion of t e invention, such as-will' -enable= 0t ers skilled in the arttowhich it appertains-to-make and use the had to the accompanyinf-drawings, an to theletters andfi ures o reference marked thereon, .Wh-ic form apart of this specification.

Our invention relates to improvements in concentrators or means 'for separating the values from the gang'ue with which they are found mingled.

Cur improvedepparatusis more especially intended for treating pulverized ore. It may, however, be employed in treating what is ordinarily knownas placer material. In other wordsthe' apparatus is of general use in carryin out the-process of concentration or the savmg'of the metallic values by stratific'ation whereby the values are caused to,

.settle or assume thelowermost position, while the gangue occupies a more elevated position, making it practicable-to separate, the worth f'gangue from portion generally termed conless material usually terms the valuable basic element or-member, a table or bed of special "construction upon which the mate- ,llfiil. may-betreated, by the use of a Idiiierem tial motion ora. motion imparting a vibratory movementto the table of such character ment is imparted to-' -the table tor' such char- 1n the drawi actor as to produce the necessary striitlfiGtttion. The diiierential movement is not in this. case neoessary' since the traveling halt performs the function ofcarrying the con:

centrates, forwardly and removing them from the table. The surface of the table may be either riflled or plain as maybede sired.

Having briefl'youtlined our; im lroved construction we will proceed tod escribe the same in detailreferencebeing made to the accompanying drawing in which is ill'us trated' an embodiment thereof.

' In this drawing, Figure 1 isa top plan view of a concentrating table embodying our invention. In this "case the table is shown in connection with a traveling belt which is partlybroken away. I Fig 2 is aside eleva- Fi 3 1s acentral iongition of the same.

tudinal section taken tnrough the apparatus.

Figs. e, 5 and 6 are'seotions taken on thelines 44, 5 -5 and; '6-6 respectively, of Fig. 2. Fig. 7 is atop view of a table-shown in connectionwith mechanism for producing differential motionl Fig. 8 is a side elevation with the o crating mechanism removed. This-is a view coking in the direction charrow S'Fig. 7 Fig. 9 is'anendelevation looking in the direction of arrow 9 Fig. Twith the end strip removed, thetable bein shownon alarger-scale; Fig. 10 is an en 1 elevation looking in the direction of" arrow 10, Fig. 7'. '2

In Figs. 8, 9 and'iO, no supporting mechanism is employed, since the only novel feature lies in-connection with the table top or bed containing the concentrating surface.

The same reference chara cters indicate the same parts in all the views.

Let thenumeral 5 designates table mount ed on spring supports 6 whereby the table'is permitted to have an oscillating or vibrator-" -movernentin the directionof its length. Thai springs 6 are secured to abase 7. j as shown, the necessa v v bratory movement may e imparted tot e taole by a pitman 8 connected at one extremity withan eccentric 9, and at the opposite extremity With the front end ofthe' table. as shown at 10. This forward end. of" the table is provided'with a depression 12 which as shown in;

the drawing has the-she e approxlmatelyof anequilateral triangle s oping frontal! sides toward apoint locatedi hi'a line oftl gslonge tudinal center of the table and near the forward extremity thereof which is the lowest point of the table. It must be understood that in this description we are not limited to mathematical accuracy in the use, of terms. We simply describe one embodiment of the construction being that shown the dra ing', but do not intend tolimit Ourselves to any precise boundaries except so far as may be necessary in view of the state of the art and the scope of the appended claims.

The rear extremity'of the triangular space 12 is located at the forward end of a central line 11 assing longitudinally through the table. his point may be designated A and the forward corners of the table as B. and C.

I The rearward corners of the table will be' designated E and F respectively, for convenience of description. Vie will also designate the lines B and C, as

the rear extremity of the line 1 1 by the refer ence letter G and the oint midway between T5 The sides A, B and A, C of the triangular space are substantially level or horizontal when the table is in use. These lines, however, may be elevated more or less at pointslB and O, as may be found expedient in practice. From points B and C to E and F respectively, the lines may slope downwa'rdlyor they may be level or upwardly inclined'slightlyfirom points near E and F (see Fig. 2). From points B and C to D the table may be downwardly inclined or -1evel'as may be found necessary or desirable in ractiee. The central line A, G of the tab e top may be termed the a ex of the table, and; from this apex as we as from the linesyA, B and A; C, the table is laterally inclined, whereby the gan ue is discharged over the opposite side e ges-of the table when the apparatus is in use. The sloping sides of the table may be designated by the numeral 13. Thcse sides ma be provided with iarallel longitudinally disposed rifiles extending rearwardly from the lines A, B, and terminating in diagonal lines H and I on the rear portion of the table (see Fig. 1). In Fig. 7 of "the drawing the riflies are not shown.

The table with or without 'the rifl'les ma be used in connection with an endless trave ing belt or apron 15 composed of canvas or other suitable flexible material adapted when traveling over the table top, to conform to the contour or configuration of the latter.

This feature is best illustrated in Fig. 1. The

belt or apron. 15 engages end drums 16 and 17. Motion is imparted tothese drums from a shaft 18 extending parallel with the longitudinal direction of the table. Motion may be communicated to this shaft from any suit-. able source of power. As shown in the drawing the shaft 18 is provided with a gear 19 meshing with a gear 2i) fast on a worm shaft 21 whose worm portion engages a worm wheel 22 fast on the ereal of the rearwardly located drum 17 When the shaft 18 is roe vtated it is evident that the drum 17 will be actuated and the endless apron caused to travel.

When the apron is emiloyed, a shaking movement is imparted to t e table as heretofore explained. This movement may be obtained from the shaft 18 which is provided with a bevel gear 23 meshing with a gear 24 fast on a shaft 25 journaled in the frame work ofthe machine. On this shaft 25is made fast a pulley 26 from which leads a belt 27 to a pulley 28 fast on the shaft 29 located forward ofthe forward extremity of the table. From the eccentric 9 on the last named shaft, leads the pitman 8 to the frame work of the table, connection being made at a point 10 underneath the forward extremity of the latter. By means of this construction the necessary shaking or vibratory movement for the pur ose of stratifying the material upon the be t may be satisfactorily obtained. In addition to engaging the end drums, the belt at the rear extremity of the table, after leaving the drum passes downwardly under aroller 32 into the water of a tank 33 and thence upwardly over a roller 35 journalcd in the. frame work of the table but located underneath the latter.

Mounted above the forward extremity of the table and centrally located with reference to the triangular feed space 12 is a feed trough or receptacle 36 hag a perforated bottom 37 through which the pulp or material mixed with water, passes to the space 12. Above the longitudinal center of the table beginning at a point ashort distance in the rear of the point A, extends a wash water pipe 38 perforated on its under side and connected with supply pipes 39 which also form means for sup )orting the pipe 38. Also mounted above t e rear )ortion of the table and on opposite sides 0 the wash water pipe 38, are two pi cs 40 which as shown in the drawing exten rearwardly and outwardly from the pipe 38. The pipes 40 are supplied with feed pipes 41 which also form their support, the pipes 40 being perforated on the under side to allow the water to pass freely to the table. These wash water pipes may be arranged in any desired manner, in order to supply the necessary wash water to effect the separation between the concentrates and the gangue. It must thereforebeunderstood that we are not limited toithe specific construction and arrangement of wash water means employed. This is also true with reference to the means for feeding the pulp to the table.

Arranged on op osite sides of the table;

are longitudinally isposed troughs 42 adaptdisposed trough -13 adapted to receive the p gauge. This trough may carry the gangue or tailings' to any desired point.

' From the foregoing description the use and operation of our improved concentrating a paratus will be readily understood. T 1e material to be treated is delivered by the feed trough 36, to thecentral part of the triangular feed space 12. Now if't e table is used alone without the endless traveling'belt, suitable mechanism 44 may be connected to its for- [ward or head extremity for the rpose of imparting thereto the necessary ificrential motion whereby the concentrates are first stratified or settled in the feed space 12, and

p5 ,--.thencaused to travel} rearwardly and longitudinally of the table, heingfinally discharged attire rear extremity thereof While the gangue is carried; transversely downwardly from the center of the table and discharged at the v2U opposite sides of the latter; The motion impartedto the tablemust therefore be of such a-nature as to roduce theaforesaid result. mother wordst ejmov'e'ment is what is ordinarily termed the differential movement or 5 mo.tip'n.-' Any suitable mechanism adapted ,to'produce this or quality of movement ;nay lie-employed in connection with our improved apparatus. 11; i

. Again assuxmng tha t the endless traveling w belt'islemployed as shown in' Figs. 1 to 4 in-- clusive, -a simple shaking or vibratory move- ,zment for stratifying purposes, is all that need gb'e emplo ed, thismec lftIllSm' being diflerentiallyi lu'strated in- Figs. 2 and 3 of the drawing. In this case the endless traveling belt or apron, conforms to the sha e of the to or concentrating surface of. t 1e table wliile traveling over the latter; and the 1na terial to be.treated-is-discharged u on the ortion of the belt covering the triangular eed',space 12.f The concentrates are carricd rearwardly with the belt, these values bein caused to settle upon the belt or 00011 the l( e shaking or vibratory'action ing over the table to the wash w'ater acting on the g'angue or'lig ter portion of the material, carries the-latter transversely down- 56 wardly on the opposite sides of the belt. This gan'gue passes/into the troughs at the opposite sides of the table as heretofore-dd scribed. The concentrates which cling to the belt as heretofore explained, are carried over the rear extremity of the table and downinto the water of a tank 33 where the concentrates areremoved therefrom. The

removal of the concentrates from the ex terior surface of the belt, is facilitated by the e employment of a perforated water pipe 45, located just forward of the roller 32. An Y material thatis not removed from the be t while passin through the water tank, will Q be washed 't erei'roin by the Water issuing from the perforated pipe 45.

located depressed trally located longitudinally disposed apex extending rearwardly from'the feed space, the top of the table being transversely inclined on op osite sides ofthe apex, said sides being prov1 ed with longitudinally disposed riflles "arranged parallel to the apex suitable means for feeding the material to be treated, to the forward portion thereof, and suitable means for supplying the table with wash water, substantially as described.

2. A concentrator provided with a concentrating surface or top, comprising a forwardly v 'eed space, an apex extending longitudinally between and parallel with the side lines'of the said top, the latter being transversely inclined from the said a ex, and iovided with riffles arranged para 10] to said apex, substantially as described.

3. A concentrator comprising a concentrating surface or to having a forwardly and centrally'located triangular depressed feed s ace, a longitudinally disposed apex locate between the side lines of the top and extending parallel with the length of the table, the latter being transversely inclined 5 from the a ex downwardly in o posits directions, said table being provide with longitudinally disposed rifiles arrangedparallel to the apex and suitable means for imparting a longitudinal vibration to the said top, substantially as described 4. A concentrating a" paratus comprising a top having a forward y located depressed feed s ace, a centrally located longitudinally isposed a ex, the top being trans- 5 vorsely inclined ownwardly from the said apex, the said top being'provided with lon iy, tudinally disposed rifiies arranged arallel iwest osition thereon under the 1nl 5 fluence of th heretofore described. Asthe belt is travely from .transversely downwardly in opposite direc- 5 tions, the sloping sides of the table being provided with longitudinally disposed rifiies arranged parallel to the apex.

6. concentrator comprising a top having a forwardly located depressed feed space, an a ex extending longitudinally of the said. top etween the side lines thereof, the top sloping downwardly therefrom transversely in opposite directions, the said transversel slo mg portions bein provided with longito inally disposed ri es, arranged parallel to the apex 7. A concentrator comprising a top having a centrally and forwardly located depression 1 forming a feed space, a longitudinally dis- 1'3 sloping sides of the ta feed s ace, being posed "apex located between the side lines of the top, the latter sloping downwardly therefrom transversely in opposite directions, the e rearwardly of the rovided with longitudinally isposed para lei rifiles whose rear extremities terminate in diagonal lines extending from the longitudinal center of the table, rearwardly and outwardly.

8. A concentrator Comprising a top having a forwardly and centrally located depressed feed space, a centrally located and longitudinally dis osed apex from which the sides of the top s ope downwardly in opposite directions said feed s ace provided with walls which slope towar a point located in the line of the longitudinal center, an endless traveling belt or apron mounted on the said top and composed of flexible material whereby the apron in passing over the top, conforms to the contour or shape of the latter and means for moving said belt over the top, sub-- stantially as described.

9. A concentrator com rising a to having a centrally and forward y located iced and settling space, a centrally located apex cxtending rearwardly from the feed space, the top having sides sloping downwardly from the apex, longitudinally disposed parallel riflles extending rearwardly irorn the feed space and terminating in diagonal lines tending from the longitudinal center of the table'rearwardly and outwardly, an. endless traveling belt or apron engaging the said top and composed of such material as to cause it to conform to the shape of said top while traveling thereover andmcans for moving said belt over the top, substantially as doscribed.

10. A concentrator comprising a top having-a forwardly located de resscd feed. and settling space, a longitudinallydisposed apex extending forwardly from the feed space, from which apex the sides of the top slope transversely downwardly equally in opposite directions, and anendless traveling belt or apron mounted on the said top and comosed of flexible material whereby the a iron in passing over the top conforms to the shape of the latter, and means for moving" said belt over the top, substantially as described.

11, A concentrator comprising a top hav-. ing a forwardl located depressed feed space, a'longitudinal y disposed apex extending forwardl from the feed space, from which apex the si es of the top S10 e transversely downwardly in opposite irections," an endless traveling belt or apron mounted on the said top, means for moving sndbelt over the top, and means for imparting a vibratory movement tothe structure,substantially as de scribed. y

12. A top or surface for concentrators having a centrally and forwardly located deassess pressed feed space triangular in. shape a longitudinally disposed apex extending roarivardly from the feed space and parallel with the side lines of said surface, the top or surface exec t the feed space being transversely inclined ownwurdly on opposite sides of said apex, toward the side lines, the said inclined surface being provided with longitudinally dis )oscd rill'ies extending renrwardly from sair. feed. space.

13. A top or surface lor coimcntrators liar ing a centrnllypu'ul forwardly located depressed feed space triangular in shape e. lon gitudinally disposed apex extending rear-- wardly from the feed space an d parallel with the side lines of said surface, the top or we face exec )i the feed space hen transversely inclined downwardly on (r. c sides ol d apex, toward the side lines, the. said inclined surface being provided with longitudimill" disposed parallel riilles whose rcnrw d trcmities terminate in diagonal extending from the longitudinal center oi the table rearwardly and outwardly.

14; A top or surface for conccntrators having a centrally and forwardly located do pressed iced space triangular in shape; a. longitudinally disposed apex extending rel wardly from the Feed space and i'inrallcl with the side lines of said surlntw, the top or surface except the feed space being transversely inclined dowmvardly on opposite sides of said apex, toward the side lines, the said inclincd surface being provided with longitu dinnlly disposed parallel rillles whose rearward i:-:tremitics terminate in dingjgmial lines ex tending from the longitudinal center oi the table rcurwurdly and outwardly, and table menus for importing a rleci 'irocoting or vi.- bratory movement to said top, subs?antinlly as described.

15. A concem'rntor coniprisdn ing a forwardly located lc.pr *wd iced space, a centrally located and longitudimilly dis posed-apex from which the sides of the top slope downwardly in opposite directions. an endless traveling belt or apron mounted on the said top and composed oi llcxiblc unite rial whereby the apron in passing over the top conforms to the contour or shape of the latter, and means for moving said belt over the top,substantially as described.

16. A transversely in'clined concentratim table having a forwardly located deprcsse feed space, a centrally located and longitudinally dis msed apex from which the sides of the top slope dowrnvardly in op osite dircc tions', an endless traveling be t or apron mounted on the said top and composed of llexiblc material whereby the a won in passing over the table conforms to t c contour or shape of the latter, and means for moving snic belt over the top, substantially as dew scribed.

Ell

lot;

l 2 li seems 17. A concentrator comprisin a top having a forwardly located de ressc feed space, a centrally located and ongitudinally dis: posed apex from which the sides of the top slope downwardly equally in opposite directions, an endless traveling belt or apron mounted on the said top and composed of.

flexible material whereby the apron in passing over the top conforms to the contour or shape of the latter, and means for moving saio belt over the top, substantially as described.

18. A concentrator comprisin a top having a forwardly located depresse feed space,

a centrallylocated and longitudinally disposed apex from which the sides of the top slope downwardly equally in op osite directions, an endless traveling be t or a ron mounted on said top and composed of exible material, whereby the apron in passing over the top conforms to the contour or. shape riflies arranged parallel with said apex, and

a forwardly located feed space whose walls slope toward a point located in the line of the longitudinal center of said top, substantially as described.

20. A concentrator com rising the top having a forwardly locate depressed feed s ace, a centrally located and longitudinally isposed apex from which the sides of the top slope downwardly in opposite directions, said sides being provided with longitudinally disposed riflles arranged. parallel to the apex of said top, substantially as described.

21. A concentrating table provided with rites having a forwardly located unriflied depressed feed space, the centrally located and longitudinally disposed apex from which the sides oi the top slope downwardly equally in opposite directions, an endless traveling belt or apron mounted on the said top and composed of flexible material whereby the apron in passing over the top conforms to the contour or shape of the latter, and means for moving said belt over the top, substantially as described. r

22. A concentrator com rising the top having a forwardly locate depressed feed s ace, a centrally located and longitudinally disposed apex from which the sides of the top slo e downwardly in opposite directions, said sidbs being provided with longitudinally disposed rifiies arranged parallel to the said apex, an endless belt or apron mounted on the said top and. composed of flexible ina terial whereby the apron in passing overthe top conforms to the contour or shape of the latter, and means for moving said belt over the top, substantially as described.

23. A transversely inclined conccntratin table having a forwardly located depresse feed space, a centrally located and longitudinally disposed apex from which the sides of the-top slope downwardly in opposite direc- ,tions, the said sides being provided with longitudinally disposed rifiies arranged parallel to th said apex, said riflies extending to the walls of the depressed feed space, substantially as described.

24. A transversely-inclined concentrating table having a forwardly located unrifiled de-' pressed feed space, a centrally located and ongitudinally disposed apex from which the sides of the to p slope downwardly in op osite directions, the said sides being provide with longitudinall r disposed riflles arranged parallel to the sai a ex, and said rifiies extending to the walls of t e depressed feed'space, substantially as described.

25. A concentrating table provided with a forwardly depressed feed space, whose walls all slope toward a point located in the line of the longitudinal center of said table, suitable means for feeding the material to be treated to said feed space, and suitable means for supplying the table witlrwash water, substantially as described.

26. A transversely inclined concentrating table having a forwardly located triangular depressed feedspace, whose walls all slope toward a point located in the line of the longitudinal center of said table, suitable means for feeding the material to be treated t6 said feed space, and suitable means for supplying the table with wash water, substant ally as described.

27. A concentrating table provided with a forwardly located depressed feed space, and a centrally located and longitudinally disposed apex from which the sides of the top slope downwardly in o posite directions,'substantially as describedi 28. A concentrating table provided with a forwardl located depressed feed space, and a centre ly located and longitudinally disposed apex from which the sides of the top Slope downwardly n pposite directio suitable means for feeding the-material to no" treated to said feed' space, and suitable means for supplying the tab c with. wash water, substantia y as described.-

29. A transversely inclined concentrating the ta 1e with'wash water, substantially'as described.

30. A concentrating apparatus comprising a surface having a forwardly located de- In testimony whereof We affix our sigma-- pressed triavngxder stratifying 3nd feed sectures in presence of two witnesses.

tion acentrally ocated on itu inalapexand 1 s Y riffled sections s10 ing laera1ly downward JAMLS EVAN) 5 from said apex an each adapted to 'receive RANDALL AKINS pul from the stratifying and. feed section, Witnesses: an means for supplying water to said su1 A. J. OBRIEN,

face. DENA NELSON. 

